1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/ioctl.h>
25 #include <sys/types.h>
28 #include "alloc-util.h"
29 #include "bus-error.h"
31 #include "cgroup-util.h"
35 #include "terminal-util.h"
36 #include "udev-util.h"
37 #include "user-util.h"
39 int manager_add_device(Manager
*m
, const char *sysfs
, bool master
, Device
**_device
) {
45 d
= hashmap_get(m
->devices
, sysfs
);
47 /* we support adding master-flags, but not removing them */
48 d
->master
= d
->master
|| master
;
50 d
= device_new(m
, sysfs
, master
);
61 int manager_add_seat(Manager
*m
, const char *id
, Seat
**_seat
) {
67 s
= hashmap_get(m
->seats
, id
);
80 int manager_add_session(Manager
*m
, const char *id
, Session
**_session
) {
86 s
= hashmap_get(m
->sessions
, id
);
88 s
= session_new(m
, id
);
99 int manager_add_user(Manager
*m
, uid_t uid
, gid_t gid
, const char *name
, User
**_user
) {
106 u
= hashmap_get(m
->users
, UID_TO_PTR(uid
));
108 r
= user_new(&u
, m
, uid
, gid
, name
);
119 int manager_add_user_by_name(Manager
*m
, const char *name
, User
**_user
) {
127 r
= get_user_creds(&name
, &uid
, &gid
, NULL
, NULL
);
131 return manager_add_user(m
, uid
, gid
, name
, _user
);
134 int manager_add_user_by_uid(Manager
*m
, uid_t uid
, User
**_user
) {
142 return errno
> 0 ? -errno
: -ENOENT
;
144 return manager_add_user(m
, uid
, p
->pw_gid
, p
->pw_name
, _user
);
147 int manager_add_inhibitor(Manager
*m
, const char* id
, Inhibitor
**_inhibitor
) {
153 i
= hashmap_get(m
->inhibitors
, id
);
161 i
= inhibitor_new(m
, id
);
171 int manager_add_button(Manager
*m
, const char *name
, Button
**_button
) {
177 b
= hashmap_get(m
->buttons
, name
);
179 b
= button_new(m
, name
);
190 int manager_process_seat_device(Manager
*m
, struct udev_device
*d
) {
196 if (streq_ptr(udev_device_get_action(d
), "remove")) {
198 device
= hashmap_get(m
->devices
, udev_device_get_syspath(d
));
202 seat_add_to_gc_queue(device
->seat
);
210 sn
= udev_device_get_property_value(d
, "ID_SEAT");
214 if (!seat_name_is_valid(sn
)) {
215 log_warning("Device with invalid seat name %s found, ignoring.", sn
);
219 seat
= hashmap_get(m
->seats
, sn
);
220 master
= udev_device_has_tag(d
, "master-of-seat");
222 /* Ignore non-master devices for unknown seats */
223 if (!master
&& !seat
)
226 r
= manager_add_device(m
, udev_device_get_syspath(d
), master
, &device
);
231 r
= manager_add_seat(m
, sn
, &seat
);
240 device_attach(device
, seat
);
247 int manager_process_button_device(Manager
*m
, struct udev_device
*d
) {
254 if (streq_ptr(udev_device_get_action(d
), "remove")) {
256 b
= hashmap_get(m
->buttons
, udev_device_get_sysname(d
));
265 r
= manager_add_button(m
, udev_device_get_sysname(d
), &b
);
269 sn
= udev_device_get_property_value(d
, "ID_SEAT");
273 button_set_seat(b
, sn
);
280 int manager_get_session_by_pid(Manager
*m
, pid_t pid
, Session
**session
) {
281 _cleanup_free_
char *unit
= NULL
;
290 r
= cg_pid_get_unit(pid
, &unit
);
294 s
= hashmap_get(m
->session_units
, unit
);
303 int manager_get_user_by_pid(Manager
*m
, pid_t pid
, User
**user
) {
304 _cleanup_free_
char *unit
= NULL
;
314 r
= cg_pid_get_slice(pid
, &unit
);
318 u
= hashmap_get(m
->user_units
, unit
);
326 int manager_get_idle_hint(Manager
*m
, dual_timestamp
*t
) {
329 dual_timestamp ts
= DUAL_TIMESTAMP_NULL
;
334 idle_hint
= !manager_is_inhibited(m
, INHIBIT_IDLE
, INHIBIT_BLOCK
, t
, false, false, 0, NULL
);
336 HASHMAP_FOREACH(s
, m
->sessions
, i
) {
340 ih
= session_get_idle_hint(s
, &k
);
346 if (k
.monotonic
< ts
.monotonic
)
352 } else if (idle_hint
) {
354 if (k
.monotonic
> ts
.monotonic
)
365 bool manager_shall_kill(Manager
*m
, const char *user
) {
369 if (!m
->kill_user_processes
)
372 if (strv_contains(m
->kill_exclude_users
, user
))
375 if (strv_isempty(m
->kill_only_users
))
378 return strv_contains(m
->kill_only_users
, user
);
381 static int vt_is_busy(unsigned int vtnr
) {
382 struct vt_stat vt_stat
;
384 _cleanup_close_
int fd
;
388 /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
389 * we'd open the latter we'd open the foreground tty which
390 * hence would be unconditionally busy. By opening /dev/tty1
391 * we avoid this. Since tty1 is special and needs to be an
392 * explicitly loaded getty or DM this is safe. */
394 fd
= open_terminal("/dev/tty1", O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
398 if (ioctl(fd
, VT_GETSTATE
, &vt_stat
) < 0)
401 r
= !!(vt_stat
.v_state
& (1 << vtnr
));
406 int manager_spawn_autovt(Manager
*m
, unsigned int vtnr
) {
407 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
408 char name
[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
414 if (vtnr
> m
->n_autovts
&&
415 vtnr
!= m
->reserve_vt
)
418 if (vtnr
!= m
->reserve_vt
) {
419 /* If this is the reserved TTY, we'll start the getty
420 * on it in any case, but otherwise only if it is not
423 r
= vt_is_busy(vtnr
);
430 snprintf(name
, sizeof(name
), "autovt@tty%u.service", vtnr
);
431 r
= sd_bus_call_method(
433 "org.freedesktop.systemd1",
434 "/org/freedesktop/systemd1",
435 "org.freedesktop.systemd1.Manager",
441 log_error("Failed to start %s: %s", name
, bus_error_message(&error
, r
));
446 static bool manager_is_docked(Manager
*m
) {
450 HASHMAP_FOREACH(b
, m
->buttons
, i
)
457 static int manager_count_external_displays(Manager
*m
) {
458 _cleanup_udev_enumerate_unref_
struct udev_enumerate
*e
= NULL
;
459 struct udev_list_entry
*item
= NULL
, *first
= NULL
;
463 e
= udev_enumerate_new(m
->udev
);
467 r
= udev_enumerate_add_match_subsystem(e
, "drm");
471 r
= udev_enumerate_scan_devices(e
);
475 first
= udev_enumerate_get_list_entry(e
);
476 udev_list_entry_foreach(item
, first
) {
477 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
478 struct udev_device
*p
;
479 const char *status
, *enabled
, *dash
, *nn
, *i
;
480 bool external
= false;
482 d
= udev_device_new_from_syspath(m
->udev
, udev_list_entry_get_name(item
));
486 p
= udev_device_get_parent(d
);
490 /* If the parent shares the same subsystem as the
491 * device we are looking at then it is a connector,
492 * which is what we are interested in. */
493 if (!streq_ptr(udev_device_get_subsystem(p
), "drm"))
496 nn
= udev_device_get_sysname(d
);
500 /* Ignore internal displays: the type is encoded in
501 * the sysfs name, as the second dash seperated item
502 * (the first is the card name, the last the connector
503 * number). We implement a whitelist of external
504 * displays here, rather than a whitelist, to ensure
505 * we don't block suspends too eagerly. */
506 dash
= strchr(nn
, '-');
511 FOREACH_STRING(i
, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-"
512 "Composite-", "SVIDEO-", "Component-",
513 "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") {
515 if (startswith(dash
, i
)) {
523 /* Ignore ports that are not enabled */
524 enabled
= udev_device_get_sysattr_value(d
, "enabled");
527 if (!streq_ptr(enabled
, "enabled"))
530 /* We count any connector which is not explicitly
531 * "disconnected" as connected. */
532 status
= udev_device_get_sysattr_value(d
, "status");
533 if (!streq_ptr(status
, "disconnected"))
540 bool manager_is_docked_or_external_displays(Manager
*m
) {
543 /* If we are docked don't react to lid closing */
544 if (manager_is_docked(m
)) {
545 log_debug("System is docked.");
549 /* If we have more than one display connected,
550 * assume that we are docked. */
551 n
= manager_count_external_displays(m
);
553 log_warning_errno(n
, "Display counting failed: %m");
555 log_debug("External (%i) displays connected.", n
);